A new study links how many hurricanes form worldwide to air pollution levels. Wednesday's study from the National Oceanic and Atmospheric Administration says cleaner air in Europe and the United States is helping trigger a dramatic increase in the number of Atlantic hurricanes.
The National Oceanic and Atmospheric Administration study links changes in regionalized air pollution across the globe to storm activity going both up and down. A 50% decrease in pollution particles and droplets in Europe and the U.S. is linked to a 33% increase in Atlantic storm formation in the past couple decades, while the opposite is happening in the Pacific with more pollution and fewer typhoons, according to the study published in Wednesday’s Science Advances.
FILE - In this satellite image provided by NOAA, Hurricane Florence churns through the Atlantic Ocean toward the U.S. East Coast, followed to the east first by Hurricane Isaac and then Hurricane Helene on Sept. 11, 2018.— which is warmed by the air — for fuel and are harmed by wind shear, which changes in upper level winds that can decapitate storm tops. Cleaner air in the Atlantic and dirtier air in the Pacific, from pollution in China and India, mess with both of those, Murakami said.
There are other factors in tropical cyclone activity with La Nina and El Nino — natural fluctuations in equatorial Pacific temperatures that alter climate worldwide — being huge. Human-caused climate change from greenhouse gases, that will grow as aerosol pollution reductions level out, is another, and there other natural long-term climatic oscillations, Murakami said.
In the Pacific, aerosol pollution from Asian nations has gone up 50% from 1980 to 2010 and is starting to drop now. Tropical cyclone formation from 2001 to 2020 is 14% lower than 1980 to 2000, Murakami said.
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